def test_syntax(self):
constructors = (Int.partial(min=-1, max=100),
Option.partial(options=('foo', 'bar')), String)
exp_syntax = ' or '.join(
(Int.partial(min=-1, max=100).syntax,
Option.partial(options=('foo', 'bar')).syntax,
String.partial().syntax))
mt = multitype(*constructors)
self.assertEqual(mt.syntax, exp_syntax)
inst = mt('hello')
self.assertEqual(inst.syntax, exp_syntax)
def test_typename(self):
constructors = (Int.partial(min=-1, max=100),
Option.partial(options=('foo', 'bar')), String)
exp_typename = ' or '.join(
(Int.partial(min=-1, max=100).typename,
Option.partial(options=('foo', 'bar')).typename,
String.partial().typename))
mt = multitype(*constructors)
self.assertEqual(mt.typename, exp_typename)
inst = mt('hello')
self.assertEqual(inst.typename, exp_typename)
def test_isinstance(self):
mt = multitype(Int, Tuple.partial(options=('foo', 'bar', 'baz')),
String.partial(minlen=1))
x = mt(49)
self.assertTrue(isinstance(x, mt))
self.assertTrue(isinstance(x, Int))
self.assertFalse(isinstance(x, String))
self.assertFalse(isinstance(x, Tuple))
x = mt('asdf')
self.assertTrue(isinstance(x, mt))
self.assertFalse(isinstance(x, Int))
self.assertTrue(isinstance(x, String))
self.assertFalse(isinstance(x, Tuple))
for value in (('foo', ), ('bar', 'baz')):
x = mt(*value)
self.assertTrue(isinstance(x, mt))
self.assertFalse(isinstance(x, Int))
self.assertFalse(isinstance(x, String))
self.assertTrue(isinstance(x, Tuple))